Improvement in middlings-separators



J. G. BIRELY.

Improvement in Middlings Separators. N0.133,193

Patented N0v.19, 1872.

Fig. 1.

A M. PHOT0-LITHOGHAPHIC C0. NX/OSEURNE S PROCESS.)

JAMES Gr. BIRELY, 0F DANVILLE, ILLINOIS.

IMPROVEMENT IN MlDDLlNGS-SEPARATORS.

Specification forming part of Letters Patent No. 133,193, dated November19, 1872.

Toall whom it may concern:

Be it known that 1, JAMES G. BIRELY, of Danville, in the county ofVermilion and State of Illinois, have invented a new and valuableImprovement in Middlin gs Separator and Cleaner; and I do hereby declarethat the following is a full, clear, and exact description of theconstruction and operation of the same, reference being had to theannexed drawing making a part of this specification,

and to letters and figures of reference marked frame of my improvedmiddlin gs separator and cleaner; B, the rectangular screen-frame orbox, supported in the frame A by the hinged arms 0. D D D D are thescreens, which are inclined and arranged in steps, one-half of onescreen overlapping the adjacent half of the screen in front of it. Thesescreens are removable, their ends being placed between parallel guidebars or cleats a, secured to the sides of the frame B. The screens aredivided into sections of different degrees of texture. The screens D D Dare each divided into two sections, and the screen D into three. E E Itdesignate brushes, supported respectively above the first and secondsections of the screen D and the lower section of screen D by means ofelastic arms 0, which are attached to the front and back part of theframe A, as shown. These arms are made with holes, through which passthe threaded parts e upon which are placed nuts e by the turning ofwhich the tension of the elastic arms and the consequent pressure of thebrushes upon thescreens are regulated. F indicates a trough, from whichthe middlings pass to the screens through the openings f, located atdifferent points to cause a general distribution of the middlings overthe surface of the upper screen. Sliding doors G are employed for vthepurpose of regulating the size of said openings. H designates ahorizontal shaft, journaled to the frame A at one side of the framecontaining the screens. This. shaft is provided with two eccentrics, h,which act upon bent arms It projecting from one side of the frame B, andcause the screens to have the proper vibratory motion.

The middlings are treated by this machine inthe following manner: First,the middlings are admitted to the first section of the screen D, whichis of very fine wire-cloth. The fine clammy flour is separated from themiddlings as they pass over said section of screen, and drops into areceiver below. The middlings, being carried onto the second section ofthe screen D and sifted, the finer grade of middlings is obtained. Themiddlings still unsifted pass to the third section of the screen, andare sifted through it to the first section of the screen D That whichnow falls through the first section of screen D is of the same qualityas the fine grade of middlings first sifted, the texture of the twosections producing such material being the same. What remains passesonto the second section of screen D and falls or is sifted through tothe first section of screen D Thefiner portion is then sifted throughthe latter, and is of the same grade as the fine middlings firstproduced. The contents of the screen D are now carried to the secondsection of said screen; The finer portion is sifted through it, and alsothrough the first section of screen D again producing the first grade ofmiddlings. That which sifts through theseeond section of screen D ismiddlings of the second grade, and that which remains after the siftingprocess passes over the tail of the machine as refuse or ship stufi. Themiddlings are now in a fine condition to be reground, after which theyare again passed through the machine and more flour obtained.

The screens above which are arranged the brushes-are to be made of finewire-cloth the others of bo1ting-cl0th.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The elastic arms 0, screw-posts 6 and In testimony that 1 ciaim theabove I have 7 nuts 0 in combination with the brushes E E hereuntosubscribed myname in the presence E applied to middlings-separators,substanof two witnesses. tially as and for the purpose specified. 4JAMES G. BIRELY.

2. The combination of the inclined screens s p D D D D the screen-frameB, hinged arms Witnesses:

O, shaft H, eccentrics h, and bent arms h, con- GEORGE E. UPHAM,structed and arranged substantially as and for PHILIP 0. MASI. thepurpose set forth.

